projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #include <linux/types.h> |
| 2 | #include <linux/errno.h> | |
| 3 | #include <asm/uaccess.h> | |
| 4 | ||
| 5 | #include "soft-fp.h" | |
| 6 | #include "double.h" | |
| 7 | ||
| 8 | int | |
| 9 | fsub(void *frD, void *frA, void *frB) | |
| 10 | { | |
| 11 | FP_DECL_D(A); | |
| 12 | FP_DECL_D(B); | |
| 13 | FP_DECL_D(R); | |
| 14 | int ret = 0; | |
| 15 | ||
| 16 | #ifdef DEBUG | |
| e48b1b45 | 17 | printk("%s: %p %p %p\n", __func__, frD, frA, frB); |
| 1da177e4 LT |
18 | #endif |
| 19 | ||
| 20 | __FP_UNPACK_D(A, frA); | |
| 21 | __FP_UNPACK_D(B, frB); | |
| 22 | ||
| 23 | #ifdef DEBUG | |
| 24 | printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); | |
| 25 | printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); | |
| 26 | #endif | |
| 27 | ||
| 28 | if (B_c != FP_CLS_NAN) | |
| 29 | B_s ^= 1; | |
| 30 | ||
| 31 | if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF) | |
| 32 | ret |= EFLAG_VXISI; | |
| 33 | ||
| 34 | FP_ADD_D(R, A, B); | |
| 35 | ||
| 36 | #ifdef DEBUG | |
| 37 | printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); | |
| 38 | #endif | |
| 39 | ||
| 40 | return (ret | __FP_PACK_D(frD, R)); | |
| 41 | } |